CN103407433B - The mounting structure of multi-stage expansion supporting leg and construction machinery and equipment - Google Patents
The mounting structure of multi-stage expansion supporting leg and construction machinery and equipment Download PDFInfo
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- CN103407433B CN103407433B CN201310311326.1A CN201310311326A CN103407433B CN 103407433 B CN103407433 B CN 103407433B CN 201310311326 A CN201310311326 A CN 201310311326A CN 103407433 B CN103407433 B CN 103407433B
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Abstract
The invention discloses a kind of mounting structure and construction machinery and equipment of multi-stage expansion supporting leg, this mounting structure comprises multistage supporting leg (10), supporting leg erecting bed (20) and retractable driving device, telescopic chute (21) is provided with in supporting leg erecting bed, be installed in telescopic chute one-level supporting leg (1) Slidable telescopic in multistage supporting leg, wherein, retractable driving device comprises at least one gear-rack drive mechanism, is provided with gear-rack drive mechanism and moves with the one-level landing leg stretching promoted in multistage supporting leg between one-level supporting leg and supporting leg erecting bed; And/or be provided with gear-rack drive mechanism between two adjacent legs in multistage supporting leg and move to promote connecing landing leg stretching in two adjacent legs, the outer wall of supporting leg is formed with mounting groove or extension adapter plate, the one in driven wheel and tooth bar is arranged in mounting groove or extension adapter plate.Have that structure is simple according to the mounting structure of multi-stage expansion supporting leg of the present invention, low cost and other advantages and being convenient to is installed, operation and maintenance.
Description
Technical field
The invention belongs to technical field of engineering machinery, particularly, relate to a kind of mounting structure of multi-stage expansion supporting leg.
Background technology
Telescopic outrigger in construction machinery and equipment is usually used in providing reliable and stable support to implement.Such as in concrete pump truck, along with the increase of the pumping distance of pump truck, the design length of jib is constantly increased, thus higher to the requirement of pump truck resistance to overturning when jib full extension.Now, need to adopt more multistage telescopic outrigger to support car body, such as, in overlength arm support pump truck, use three grades of telescopic outriggers more and more, to obtain the stable support region of more wide region, make support more stable, reliable.
Fig. 1 is the structural representation of the mounting structure of a kind of three grades of telescopic outriggers used in the overlength arm support pump truck according to prior art, which uses multi-stage expansion hydraulic oil cylinder driving three grades of telescopic outriggers.As shown in the figure, in the mounting structure of these three grades of telescopic outriggers, one-level supporting leg 1 in multistage supporting leg 10 to be directly installed on supporting leg erecting bed 20 and can telescopic moving in telescopic chute 21 wherein, be connected in secondary supporting leg 2 in one-level supporting leg 1 to stretch, be connected in three grades of supporting legs 3 in secondary supporting leg 2 to stretch, three grades of telescopic outriggers present length of run as shown in Figure 1 when launching completely, then can be contracted to completely in telescopic chute 21 when shrinking completely.In the telescopic process of each supporting leg in multistage supporting leg 10, driver train is all needed to drive.Three grades of telescopic outriggers in Fig. 1 employ multi-stage expansion oil cylinder 11 and drive.The drive scheme structure of this employing multi-stage expansion oil cylinder 11 is very simple, there is not any technical barrier yet, but shortcoming is multi-stage expansion oil cylinder 11 needs to provide comparatively large driving force in the process used, the stressed moment of end is large, easy distortion, and the weight of multi-stage expansion oil cylinder 11 is comparatively large, wayward.
In addition, other combination driver trains such as CD-ROM drive motor is also adopted to drive in conjunction with the combination of steel rope in addition, or the CD-ROM drive motor combination driving combining binding oil cylinder etc.Wherein, scenario-frame when adopting CD-ROM drive motor to combine binding oil cylinder is also comparatively simple, and space requirement is little, makes precision and easily ensures, and technology maturation, but shortcoming to be the usage quantity of CD-ROM drive motor and oil cylinder many, oil pipe complicated layout, cost is relatively high.When adopting the drive scheme of CD-ROM drive motor in conjunction with steel rope or chain, its structural weight is relatively light, can alleviate the weight of whole multi-stage expansion supporting leg, but shortcoming be arrange and force analysis comparatively complicated, higher to requirements of installation space, and not easy-maintaining.
Summary of the invention
The object of this invention is to provide a kind of mounting structure of multi-stage expansion supporting leg, structure is simple, cost is low and be convenient to install, operation and maintenance.
For achieving the above object, according to an aspect of the present invention, provide a kind of mounting structure of multi-stage expansion supporting leg, this mounting structure comprises multistage supporting leg, supporting leg erecting bed and retractable driving device, telescopic chute is provided with in described supporting leg erecting bed, be socketed each other between adjacent legs in described multistage supporting leg and driven with telescopic moving by described retractable driving device, be installed in described telescopic chute one-level supporting leg Slidable telescopic in described multistage supporting leg, wherein, described retractable driving device comprises at least one gear-rack drive mechanism, be provided with described gear-rack drive mechanism between described one-level supporting leg and supporting leg erecting bed to move with the one-level landing leg stretching promoted in described multistage supporting leg, and/or be provided with described gear-rack drive mechanism between two adjacent legs in described multistage supporting leg and move to promote connecing landing leg stretching in described two adjacent legs,
Wherein, described gear-rack drive mechanism comprises engine installation, driven wheel and tooth bar, and described driving gear wheel and rack engages each other and driven by described engine installation,
The outer wall connecing supporting leg in the outer wall of described one-level supporting leg and/or described two adjacent legs is formed with the mounting groove or extension adapter plate that extend along landing leg stretching direction, one in described driven wheel and tooth bar is arranged in described mounting groove or extension adapter plate, and another one is correspondingly arranged on the inwall of the external supporting leg in described supporting leg erecting bed or in described two adjacent legs.
Preferably, described engine installation and driven wheel are arranged in the one in described one-level supporting leg and supporting leg erecting bed, and described tooth bar is arranged in another one; And/or described engine installation and moving gear are arranged in the one in described two adjacent legs, described tooth bar is arranged in another one.
Preferably, described telescopic chute is rectangular cross section slideway, and each supporting leg of described multistage supporting leg is rectangular cross section supporting leg, and described mounting groove or extension adapter plate are located on the both sides sidewall of described square-section supporting leg.
Preferably, the both sides of described one-level supporting leg are provided with described gear-rack drive mechanism respectively symmetrically, and/or in described two adjacent legs in connect supporting leg both sides described gear-rack drive mechanism is installed respectively symmetrically.
Preferably, described engine installation is HM Hydraulic Motor or electro-motor, and the output shaft of described engine installation is connected to described driven wheel and rotates can drive this driven wheel.
As optional a kind of embodiment, in described multistage supporting leg, between every two adjacent legs between described one-level supporting leg and described supporting leg erecting bed and in described multistage supporting leg, be respectively equipped with described gear-rack drive mechanism.
As optional another kind of embodiment, described multistage supporting leg comprises one-level supporting leg and the secondary supporting leg of socket mutually, described gear-rack drive mechanism is provided with between described one-level supporting leg and described supporting leg erecting bed, and described retractable driving device also comprises monomer oil cylinder, the cylinder body of this monomer oil cylinder is arranged on described one-level supporting leg and the piston rod that stretches out of described monomer oil cylinder connects in described secondary supporting leg, to promote the telescopic moving in described one-level supporting leg of this secondary supporting leg.
As optional also a kind of embodiment, described multistage supporting leg comprises the described one-level supporting leg be socketed successively, secondary supporting leg and three grades of supporting legs, described gear-rack drive mechanism is provided with between described one-level supporting leg and described supporting leg erecting bed, and described retractable driving device also comprises binding oil cylinder, this binding oil cylinder comprises the first oil cylinder and the second oil cylinder, the piston rod of this first oil cylinder and the second oil cylinder in the opposite direction, the cylinder body of this first oil cylinder and the second oil cylinder is mutually bound and is installed in described secondary supporting leg, the piston rod that stretches out of described first oil cylinder connects described one-level supporting leg, the piston rod that stretches out of described second oil cylinder connects described three grades of supporting legs.
According to another aspect of the present invention, correspondingly provide a kind of construction machinery and equipment, this project machinery comprises the mounting structure according to the above-mentioned multi-stage expansion supporting leg of the present invention.
Pass through technique scheme, in the mounting structure of multi-stage expansion supporting leg according to the present invention, have employed gear-rack drive mechanism as retractable driving device, the structure of gear-rack drive mechanism is simple, with low cost, and because the installing space of gear-rack drive mechanism is little, simply, weight is relatively light for layout and stressing conditions, can be installed in leg structure easily, also can jointly drive in conjunction with other driver trains such as oil cylinders easily.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the structural representation of the mounting structure of the three grades of telescopic outriggers used in the overlength arm support pump truck according to prior art, which uses multi-stage expansion hydraulic oil cylinder driving three grades of telescopic outriggers;
Fig. 2 is the structural representation of the mounting structure of multi-stage expansion supporting leg according to the preferred embodiment of the present invention;
One-level supporting leg in the mounting structure that Fig. 3 is the multi-stage expansion supporting leg shown in Fig. 2 or in connect the schematic diagram of a kind of cross-sectional structure of supporting leg; And
One-level supporting leg in the mounting structure that Fig. 4 is the multi-stage expansion supporting leg shown in Fig. 2 or in connect the schematic diagram of the another kind of cross-sectional structure of supporting leg.
description of reference numerals
1 one-level supporting leg 2 secondary supporting leg
3 three grades of supporting leg 4 engine installations
5 driven wheel 6 tooth bars
7 mounting groove 8 extension adapter plates
The multistage supporting leg of 9 binding oil cylinder 10
11 multi-stage expansion oil cylinder 12 bracing or strutting arrangements
20 supporting leg erecting bed 21 telescopic chute
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality used as " upper and lower " normally for direction shown in the drawings or for each parts mutual alignment relationship description word vertically, on vertical or gravity direction, same, " left and right " is normally for paper Width.Also it should be noted that, " one-level supporting leg " in multistage supporting leg refers to end supporting leg direct coupled with supporting leg erecting bed, sorts successively as secondary supporting leg, three grades of supporting legs etc. from one-level supporting leg along the direction to external extension.Term " inside connects supporting leg " and refers in telescopic adjacent two supporting legs, insert the inner leg of also carrying out telescopic moving in the inner chamber of one of them supporting leg in the lumen, this inner leg is be socketed in the inner chamber of this another supporting leg for another supporting leg, thus connect supporting leg in being called, correspondingly this another supporting leg is called external supporting leg.
As shown in Figure 2, the invention provides a kind of mounting structure of multi-stage expansion supporting leg, this mounting structure comprises multistage supporting leg 10, supporting leg erecting bed 20 and retractable driving device, telescopic chute 21 is provided with in supporting leg erecting bed 20, be socketed each other between adjacent legs in multistage supporting leg 10 and drive with telescopic moving by retractable driving device, be installed in telescopic chute 21 one-level supporting leg 1 Slidable telescopic in multistage supporting leg 10, wherein, retractable driving device comprises at least one gear-rack drive mechanism, gear-rack drive mechanism is provided with to promote one-level supporting leg 1 telescopic moving in multistage supporting leg 10 between one-level supporting leg 1 and supporting leg erecting bed 20, and/or be provided with gear-rack drive mechanism between two adjacent legs in multistage supporting leg 10 and move to promote connecing landing leg stretching in two adjacent legs.In the present invention, adopt driver train and the type of drive such as multi-stage expansion oil cylinder, binding oil cylinder, oil cylinder band steel cable, motor band steel cable or chain in prior art more, thus bring or cost high, or placement-and-routing's difficulty, requirements of installation space is large, be not easy to many defects such as maintenance, gear-rack drive mechanism be incorporated in multi-stage expansion leg structure initiatively.Gear-rack drive mechanism force analysis is simple, and transmission performance is strong, and structure is simple, with low cost and easy for installation, without the need to too much wiring, thus saves supporting leg inner space, and convenient later maintenance, will specifically address below.
The gear-rack drive mechanism that this place adopts is conventional gear tooth bar structure, comprises engine installation 4, driven wheel 5 and tooth bar 6, and driven wheel 5 and tooth bar 6 engage each other and driven by engine installation 4.Wherein, engine installation 4 and driven wheel 5 are arranged in the one in one-level supporting leg 1 and supporting leg erecting bed 20, and tooth bar 6 is arranged in another one; And/or engine installation 4 and moving gear 5 are arranged in the one in two adjacent legs, tooth bar 6 is arranged in another one.Particularly, gear-rack drive arrangement of mechanism is shown between one-level supporting leg 1 and supporting leg erecting bed 20 in Fig. 2, tooth bar 6 is fixedly mounted in the outside wall surface of one-level supporting leg 1 vertically, and driven wheel 5 is arranged on the axle drive shaft of engine installation 4 (such as motor).This axle drive shaft drives driven wheel 5 to rotate, and then by gears meshing, band carry-over bar 6 and one-level supporting leg 1 telescopic moving be vertically fixedly connected with it.Similarly, also can identical set when such as arranging gear-rack drive mechanism between one-level supporting leg 1 and secondary supporting leg 2 or between secondary supporting leg 2 and three grades of supporting legs 3.Further, the installation site of rack-and-gear is interchangeable, and namely tooth bar 6 can be arranged on the inwall of such as telescopic chute 21 or external supporting leg, and driven wheel 5 can be arranged on relative one-level supporting leg 1 or in connect on the outer wall of supporting leg.
Participate in Fig. 3 or Fig. 4, which show tooth bar 6 be fixedly mounted on one-level supporting leg or in connect two kinds of mounting meanss in supporting leg.The structure that have employed mounting groove 7 in Fig. 3 have employed the structure of extension adapter plate 8 to install tooth bar 6 to install tooth bar 6, Fig. 4.The mounting groove 7 extended along landing leg stretching direction or extension adapter plate 8 are formed in in the outer wall of one-level supporting leg 1 and/or two adjacent legs and connect on the outer wall of supporting leg, correspondingly, one in driven wheel 5 and tooth bar 6 is arranged in mounting groove 7 or extension adapter plate 8, and another one is arranged on the inwall of the external supporting leg in supporting leg erecting bed 20 or in two adjacent legs.Concrete, the mounting groove 7 shown in Fig. 3 is formed by carrying out extrusion process to the two side of rectangle supporting leg.Extension adapter plate 8 can directly be welded on the two side of rectangle supporting leg more simply.It should be noted that, before carrying out supporting leg processing, need to connect gap between supporting leg and external supporting leg in design, make it reserved enough spaces to install driven wheel 5 and tooth bar 6 even engine installation 4 etc.Wherein preferably, as shown in Fig. 2, Fig. 3 or Fig. 4, by tooth bar 6 but not driven wheel 5 is fixedly mounted in mounting groove 7 or extension adapter plate 8, stressed more balanced, more steady in such telescopic moving process.Otherwise, reliable in order to operate steadily, connect in single in mounting groove 7 on the outer wall of supporting leg or one-level supporting leg 1 or extension adapter plate 8 and need to arrange the spaced driven wheel 5 being no less than two, to carry out support leg with tooth bar 6 engaging stress respectively and to drive supporting leg steadily to stretch.
Typically, the multi-stage expansion supporting leg used in construction machinery and equipment is rectangle supporting leg, namely each supporting leg of multistage supporting leg 10 is rectangular cross section supporting leg, corresponding telescopic chute 21 is rectangular cross section slideway, mounting groove 7 or extension adapter plate 8 are arranged on the both sides sidewall of square-section supporting leg, respectively as shown in Figure 3 and Figure 4.More preferably, in rectangle supporting leg, stressed more balanced larger with telescopic drive power in order to make, the both sides connecing supporting leg in one-level supporting leg 1 and/or two adjacent legs can be provided with gear-rack drive mechanism respectively symmetrically, namely jointly promote landing leg stretching by the Liang Ge gear-rack drive mechanism of the left and right sides.Liang Ge gear-rack drive mechanism carries out synchromesh and drives, and this is also driven driven wheel 5 respectively by synchronous dynamo or is realized by same driven by motor driven wheel 5.Wherein, engine installation 4 can be HM Hydraulic Motor or electro-motor etc., the output shaft of engine installation 4 is connected to driven wheel 5 and rotates can drive this driven wheel 5, or as shown in Figure 2, with synchronous axial system on output shaft driven wheel 5 being directly installed on engine installation 4.
On the structure composition of gear-rack drive mechanism described above and the basis of mounting structure, the mounting structure of the multi-stage expansion supporting leg of this gear-rack drive mechanism of several employing will be set forth below.
As a kind of preferred structure mode, in the multistage supporting leg 10 of the mounting structure of multi-stage expansion supporting leg, between every two adjacent legs between one-level supporting leg 1 and supporting leg erecting bed 20 and in multistage supporting leg, be respectively equipped with gear-rack drive mechanism.In other words, between each telescoping member needing relative telescopic to drive, all power driven can be carried out by gear-rack drive mechanism.This can preferably be widely used in two-stage supporting leg or three grades of supporting legs, in more multi-stage expansion supporting leg, then may need arrange too much engine installation 4 and consider the control coordination etc. each other of each engine installation 4.
In another kind of preferred structure mode, gear-rack drive mechanism can carry out combination in conjunction with oil cylinder and drive.Such as, multistage supporting leg 10 comprises one-level supporting leg 1 and the secondary supporting leg 2 of socket mutually, gear-rack drive mechanism is provided with between one-level supporting leg 1 and supporting leg erecting bed 20, and retractable driving device also comprises monomer oil cylinder, the cylinder body of this monomer oil cylinder is arranged on one-level supporting leg 1 and the piston rod that stretches out of monomer oil cylinder connects in secondary supporting leg 2, to promote this secondary supporting leg 2 telescopic moving in one-level supporting leg 1.Have employed gear-rack drive mechanism and monomer oil cylinder in this two-stage landing leg stretching structure to carry out combination and drive.In addition, gear-rack drive mechanism also can in conjunction with the such as use such as chain drive mechanism, multi-stage expansion fuel cylinder driving mechanism of other driver trains.
What Fig. 2 showed is a kind of mounting structure typically comprising the multi-stage expansion supporting leg of gear-rack drive mechanism.Wherein, multistage supporting leg 10 comprises the one-level supporting leg 1 be socketed successively, secondary supporting leg 2 and three grades of supporting legs 3, gear-rack drive mechanism is provided with between one-level supporting leg 1 and supporting leg erecting bed 20, and retractable driving device also comprises binding oil cylinder 9, this binding oil cylinder 9 comprises the first oil cylinder (i.e. piston rod arrange towards the left side oil cylinder) and the second oil cylinder, the piston rod of this first oil cylinder and the second oil cylinder in the opposite direction, the cylinder body of this first oil cylinder and the second oil cylinder is mutually bound and is installed in secondary supporting leg 2, the piston rod that stretches out of the first oil cylinder connects one-level supporting leg 1, the piston rod that stretches out of the second oil cylinder 2 connects three grades of supporting legs 3.Individual operation first oil cylinder, can drive secondary supporting leg 2 to stretch in the inner chamber of one-level supporting leg 1.Individual operation second oil cylinder, can drive three grades of supporting legs 3 to stretch in the inner chamber of secondary supporting leg 2.This binding hydraulic oil cylinder driving mode is comparatively common, the technology maturations such as oil pipe layout, can combination gear rack drives mechanism use easily.Fig. 2 illustrates in binding oil cylinder 9 full extension and three grades of telescopic outriggers situation about launching completely, and now final stage supporting leg i.e. three grades of supporting legs 3 are supported on ground by bracing or strutting arrangement 12.
In addition, the present invention is corresponding provides a kind of construction machinery and equipment, and this project machinery comprises the mounting structure according to the above-mentioned multi-stage expansion supporting leg of the present invention.Due to by gear-rack drive mechanism first Application in the mounting structure of multi-stage expansion supporting leg, it also must have various advantage as above, be namely easy to install, operation, cost is low, save supporting leg inner space, convenient later maintenance etc.Wherein, this construction machinery and equipment can include but not limited to the associated vehicles such as concrete pump truck and machinery.Be not limited to three grades of X supporting legs etc. in the mounting structure of multi-stage expansion supporting leg, be also not limited only to as front leg strut.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; multiple simple change can be carried out to technical scheme of the present invention; such as gear-rack drive mechanism is not limited to as Fig. 2 or being only applied on one-level supporting leg and supporting leg brace table as above described in each embodiment, and these simple change all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. the mounting structure of a multi-stage expansion supporting leg, this mounting structure comprises multistage supporting leg (10), supporting leg erecting bed (20) and retractable driving device, telescopic chute (21) is provided with in described supporting leg erecting bed (20), be socketed each other between adjacent legs in described multistage supporting leg (10) and driven with telescopic moving by described retractable driving device, be installed in described telescopic chute (21) one-level supporting leg (1) Slidable telescopic in described multistage supporting leg (10), it is characterized in that, described retractable driving device comprises at least one gear-rack drive mechanism, described gear-rack drive mechanism is provided with to promote one-level supporting leg (1) telescopic moving in described multistage supporting leg (10) between described one-level supporting leg (1) and supporting leg erecting bed (20), and/or be provided with described gear-rack drive mechanism between two adjacent legs in described multistage supporting leg (10) and move to promote connecing landing leg stretching in described two adjacent legs,
Wherein, described gear-rack drive mechanism comprises engine installation (4), driven wheel (5) and tooth bar (6), described driven wheel (5) and tooth bar (6) engage each other and are driven by described engine installation (4)
The outer wall connecing supporting leg in the outer wall of described one-level supporting leg (1) and/or described two adjacent legs is formed with the mounting groove (7) or extension adapter plate (8) that extend along landing leg stretching direction, one in described driven wheel (5) and tooth bar (6) is arranged in described mounting groove (7) or extension adapter plate (8), and another one is correspondingly arranged on the inwall of the external supporting leg in described supporting leg erecting bed (20) or in described two adjacent legs.
2. the mounting structure of multi-stage expansion supporting leg according to claim 1, is characterized in that,
Described engine installation (4) and driven wheel (5) are arranged in the one in described one-level supporting leg (1) and supporting leg erecting bed (20), and described tooth bar (6) is arranged in another one; And/or
Described engine installation (4) and driven wheel (5) are arranged in the one in described two adjacent legs, and described tooth bar (6) is arranged in another one.
3. the mounting structure of multi-stage expansion supporting leg according to claim 2, it is characterized in that, described telescopic chute (21) is rectangular cross section slideway, each supporting leg of described multistage supporting leg (10) is rectangular cross section supporting leg, and described mounting groove (7) or extension adapter plate (8) are located on the both sides sidewall of described square-section supporting leg.
4. the mounting structure of multi-stage expansion supporting leg according to claim 3, is characterized in that, the both sides of described one-level supporting leg (1) are provided with described gear-rack drive mechanism respectively symmetrically, and/or
The both sides connecing supporting leg in described two adjacent legs are provided with described gear-rack drive mechanism respectively symmetrically.
5. the mounting structure of multi-stage expansion supporting leg according to claim 1, it is characterized in that, described engine installation (4) is HM Hydraulic Motor or electro-motor, and the output shaft of described engine installation (4) is connected to described driven wheel (5) and rotates can drive this driven wheel (5).
6. according to the mounting structure of the multi-stage expansion supporting leg in claim 1-5 described in any one, it is characterized in that, in described multistage supporting leg (10), between every two adjacent legs between described one-level supporting leg (1) and described supporting leg erecting bed (20) and in described multistage supporting leg, be respectively equipped with described gear-rack drive mechanism.
7. according to the mounting structure of the multi-stage expansion supporting leg in claim 1-5 described in any one, it is characterized in that, described multistage supporting leg (10) comprises one-level supporting leg (1) and the secondary supporting leg (2) of socket mutually, described gear-rack drive mechanism is provided with between described one-level supporting leg (1) and described supporting leg erecting bed (20), and described retractable driving device also comprises monomer oil cylinder, the cylinder body of this monomer oil cylinder is arranged on that described one-level supporting leg (1) is upper and the piston rod that stretches out of described monomer oil cylinder connects in described secondary supporting leg (2), to promote the telescopic moving in described one-level supporting leg (1) of this secondary supporting leg (2).
8. according to the mounting structure of the multi-stage expansion supporting leg in claim 1-5 described in any one, it is characterized in that, described multistage supporting leg (10) comprises the described one-level supporting leg (1) be socketed successively, secondary supporting leg (2) and three grades of supporting legs (3), described gear-rack drive mechanism is provided with between described one-level supporting leg (1) and described supporting leg erecting bed (20), and described retractable driving device also comprises binding oil cylinder (9), this binding oil cylinder (9) comprises the first oil cylinder and the second oil cylinder, the piston rod of this first oil cylinder and the second oil cylinder in the opposite direction, the cylinder body of this first oil cylinder and the second oil cylinder is mutually bound and is installed in described secondary supporting leg (2), the piston rod that stretches out of described first oil cylinder connects described one-level supporting leg (1), the piston rod that stretches out of described second oil cylinder connects described three grades of supporting legs (3).
9. a construction machinery and equipment, is characterized in that, this project machinery comprises the mounting structure according to the multi-stage expansion supporting leg in claim 1-8 described in any one.
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| CN103753558B (en) * | 2013-12-23 | 2016-02-03 | 哈尔滨工业大学 | There is the small-sized search and rescue robot throwing in function |
| CN106274842A (en) * | 2016-08-30 | 2017-01-04 | 北汽福田汽车股份有限公司 | Supporting leg retractable mechanism and engineering machinery |
| CN108016997A (en) * | 2018-01-11 | 2018-05-11 | 河南恩湃高科集团有限公司 | A kind of narrow space crane support |
| CN110901602A (en) * | 2019-12-10 | 2020-03-24 | 湖南响箭重工科技有限公司 | Pin-rack transmission telescopic two-stage telescopic supporting leg system |
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| US6623035B1 (en) * | 1999-05-05 | 2003-09-23 | Actuant Corporation | Landing gear |
| CN101698407A (en) * | 2009-11-18 | 2010-04-28 | 三一汽车制造有限公司 | Movable type engineering machine and support leg device thereof |
| WO2011072523A1 (en) * | 2009-12-15 | 2011-06-23 | 湖南三一智能控制设备有限公司 | Supporting device for crane and crane thereof |
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Effective date of registration: 20200927 Address after: No.202 Xuanfu street, Xuanhua District, Zhangjiakou, Hebei Province Patentee after: Hebei Leisa Heavy Construction Machinery Co., Ltd Address before: 102206 Changping District City, Shahe, Sha Yang Road, Beijing Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |
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